More HEIF-related tests.

New option `KIMAGEFORMATS_HEIC_TEST` for testing images with
HEVC codec only.

Existing option `KIMAGEFORMATS_HEIF_TEST` is used for testing other
possible (mostly quite rare) codecs that might be used by HEIF
images - uncompressed, deflate, zlib, brotli, jpeg.

autotests/read/heic/orientation1.heic.json

@@ -0,0 +1,17 @@
+[
+    {
+        "fileName" : "orientation_all.png",
+        "colorSpace" : {
+            "description" : "GIMP built-in sRGB",
+            "primaries" : "SRgb",
+            "transferFunction" : "SRgb",
+            "gamma" : 0
+        },
+        "metadata" : [
+            {
+                "key" : "Software" ,
+                "value" : "LIFE Pro 2.20.35 (Linux)"
+            }
+        ]
+    }
+]